نتایج جستجو برای: contact aureole

تعداد نتایج: 162301  

Journal: :journal of sciences islamic republic of iran 0

buchitic glassy rocks appear within the skarn of contact metamorphic aureole of feshark intrusive complex situated 30 km northeast of isfahan. intrusive complex is a multistage intrusion . noritic gabbro is the first inttrusion which is invaded later on by a granitic melt. granitic melt has metasomatically altered the gabbro and as a consequence a suite of hybrid rocks like monzogabbro, monzodi...

Journal: :Journal of Metamorphic Geology 2022

Major, minor, and trace element geochemistry as well iron oxidation state isotopes were investigated in serpentinites olivine-talc fels present along a metamorphic gradient the Bergell contact aureole (Central European Alps) to evaluate mobility during serpentine. This is an ideal target study dehydration of mantle rocks due increase temperature from greenschist facies conditions (350°C) amphib...

قادری زفره, علی , مؤذن, محسن , همام, سید مسعود ,

Intrusion of the Chahghand gabbrodiorite in regionally metamorphosed rocks of the Sanandaj-Sirjan zone in NE of Neyriz has caused contact metamorphism. A variety of pelitic hornfelses are formed as a result of thermal metamorphism. Spatial distribution of minerals in the Chahghand aureole defines three mineralogical zones namely cordierite, andalusite and sillimanite zones. Study of metamo...

Buchitic glassy rocks appear within the skarn of contact metamorphic aureole of Feshark intrusive complex situated 30 km northeast of Isfahan. Intrusive complex is a multistage intrusion . Noritic gabbro is the first inttrusion which is invaded later on by a granitic melt. Granitic melt has metasomatically altered the gabbro and as a consequence a suite of hybrid rocks like monzogabbro, m...

مجرد, منیر, موذن, محسن, موید, محسن,

Contact metamorphism in the Shahindezh Metamorphic Core (SMC), which is occurred due to intrusion of Pichaghchi granodiorite during Laramian orogeny (Upper Cretaceous), is studied here. The well deve loped mineral parageneses at the aureo le is quatz + plagioclase + biotite + cordierite ± chlorite ± K-feldspar ± muscovite ± andalusite ± sillimanite ± garnet. Pressure and temperature of the...

2003
T. Mark Harrison

The conditions at which monazite and allanite were produced and destroyed during prograde metamorphism of pelitic rocks were determined in a Buchan and a Barrovian regional terrain and in a contact aureole, all from northern New England, USA. Pelites from the chlorite zone of each area contain monazite that has an inclusion-free core surrounded by a highly irregular, inclusion-rich rim. Texture...

Journal: :Geological Magazine 2021

Abstract Zircon separates from the contact aureole of syn-tectonic Dawros–Currywongaun–Doughruagh Complex, western Ireland, are studied to constrain nature and timing magmatism associated with early stages Grampian Orogeny. The samples analysed come uppermost part Dalradian Supergroup in northern Connemara (the Ben Levy Grit Formation), where a laterally extensive (>10 km) package metamorpho...

Journal: :Swiss Journal of Geosciences 2022

Abstract Petrographic observations combined with mineral compositional analyses constrain the phase relations of prograde metamorphosed serpentinites in Bergell contact aureole (Italy). In a 1500 m profile perpendicular to north-eastern edge intrusion, seven dehydration reactions ran completion. Three previously undocumented have been identified within 70 intrusive contact: olivine + anthophyll...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید